PHP Deserialize NULL values converted to correctly

PHP Deserialize now correctly returns N as a null instead of an empty object

src/core/operations/PHPDeserialize.mjs

@@ -128,8 +128,7 @@ class PHPDeserialize extends Operation {
             switch (kind) {
                 case "n":
                     expect(";");
-                    return "";
-
+                    return "null";
                 case "i":
                 case "d":
                 case "b": {